They are good T5's and will 100% grow your plants (not like a halide or higher spec LED) but they do not penatrate the water with the same light as LED or halides, I think it would suit you best to use the T5's and then add some LED to your setup, you can always custom add LEDS, and for someone with your experience of hacks/mods etc it would be a breeze to add some LEDS - cheap too.

I am currently making a 1500mm long x 100mm wide x 16mm thick, aluminium heat sink for 10 cree 10watt LEDS for my tank, I think it will add serious punch to my setup!

Mick